Light source device and endoscope

Abstract

The utility model discloses a light source device and an endoscope, and relates to the technical field of medical illumination. The light source generating assembly comprises at least two light sources which are distributed in a straight line and can generate light with different colors; the collimating lenses are arranged at the light emitting ends of the light sources and used for collimating light rays generated by the light sources; the dichroscopes are arranged at the light emitting ends of the collimating lenses and used for filtering the light passing through the collimating lenses; the beam combining part is kept vertical to the light-emitting optical axis of the transmission light of each dichroscope and is used for combining the light rays generated by all the light sources; and the relay lens is arranged between any two adjacent dichroscopes and is used for restraining the light so as to improve the output efficiency of the light. The utility model aims to maintain collimated transmission of light beams.

Description

Technical Field

[0001] The utility model relates to the technical field of medical lighting, in particular to a light source device and an endoscope. Background Art

[0002] An endoscope is a medical device used to inspect and observe internal organs and tissues of the human body. It consists of a long, flexible tube that contains an optical system and an image sensor, allowing doctors or operators to detect and diagnose diseases or lesions non-invasively. In medical examinations, it is common to use endoscopes for exploration. The medical endoscope inspection system contains multiple subsystems, among which the light source is an important part as an illumination light supply device. In actual inspections, the light source needs to provide different special lights to observe the inspected tissue at multiple levels.

[0003] To this end, the prior art discloses a light source device, including a first light source, a second light source, a third light source and a fourth light source, wherein the light emitted by the first light source, the second light source, the third light source and the fourth light source is collimated by a first lens, a second lens, a third lens and a fourth lens respectively, and then the collimated light is transmitted to a first dichroic mirror, a second dichroic mirror and a third dichroic mirror respectively to achieve beam combination of light paths. The light source is sequentially passed through a collimating lens, a dichroic mirror and finally beam combined. Due to the long length of the endoscope, the light source will cause light beam deflection during the transmission process.

[0004] Therefore, how to maintain the collimated transmission of the light beam has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] The main purpose of the utility model is to provide a light source device and an endoscope, aiming at maintaining the collimated transmission of a light beam.

[0006] In order to achieve the above object, the utility model provides a light source device, comprising:

[0007] At least one group of light source generating components, the light source generating components comprising at least two light sources distributed in a straight line and capable of generating light of different colors; a collimating lens disposed at the light output end of each light source for collimating the light generated by the light source; a dichroic mirror disposed at the light output end of each collimating lens for filtering the light passing through the collimating lens; a beam combining component which is perpendicular to the light output axis of the transmitted light of each dichroic mirror and is used for combining the light generated by all the light sources; and a relay lens disposed between any two adjacent dichroic mirrors and is used for constraining the light to improve its output efficiency.

[0008] In one embodiment of the present application, the light source includes a mounting circuit board, on which a lamp bead capable of generating light is disposed, and the circuit board is connected to a heat conducting member capable of conducting heat away from the lamp bead when the lamp bead is working.

[0009] In one embodiment of the present application, the number of the lamp beads is three, namely a first lamp bead, a second lamp bead, and a third lamp bead; the first lamp bead is used to generate white light.

[0010] In one embodiment of the present application, the color spectrum range of the light generated by the second lamp bead is A, 430nm≤A≤480nm.

[0011] In one embodiment of the present application, the color spectrum range of the light generated by the third lamp bead is B, 390nm≤B≤430nm.

[0012] In one embodiment of the present application, the outermost dichroic mirror farthest from the light combiner can be replaced by a right-angle prism that reflects the light corresponding to it so that the light enters the light combiner.

[0013] In one embodiment of the present application, the working surface of the relay lens and the light emitted by the dichroic mirror are perpendicular to each other.

[0014] In one embodiment of the present application, the light source generating components are two groups arranged in parallel.

[0015] In one embodiment of the present application, a shading plate is disposed between two groups of light source generating components.

[0016] The present application discloses an endoscope, comprising a light source device as described in any one of the above.

[0017] With the above technical solution, multiple light sources in the light source generating assembly can generate light of different colors, so that the system has a variety of light source options to meet the needs of different applications. The collimating lens can collimate the light generated by the light source to make it a parallel beam; the dichroic mirror can achieve selective reflection and transmission of light of different wavelengths through color filtering and separation. The beam combiner brings together the light generated by all light sources to form a combined beam of light. This helps to concentrate the energy and directionality of the light and improve the light output efficiency of the system. The relay lens plays a role in constraining the light and optimizing the light transmission between adjacent dichroic mirrors. It can adjust the transmission angle of the light and focus the light, thereby improving the light output quality and efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;

[0020] Figure 2 It is a side sectional view of the first embodiment of the utility model;

[0021] 11. first lamp bead; 12. second lamp bead; 13. third lamp bead; 20. collimating lens; 30. dichroic mirror; 40. relay lens; 50. beam combiner; 60. right-angle prism; 70. partition. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the utility model and do not constitute a limitation on the utility model.

[0023] like Figure 1 to Figure 2 As shown, in order to achieve the above-mentioned purpose, the utility model proposes a light source device, comprising:

[0024] At least one group of light source generating components, the light source generating components comprising at least two light sources which are distributed in a straight line and can generate light of different colors; a collimating lens 20 disposed at the light output end of each light source for collimating the light generated by the light source; a dichroic mirror 30 disposed at the light output end of each collimating lens 20 for filtering the light passing through the collimating lens 20; a beam combining component 50 which is perpendicular to the light output axis of the transmitted light of each dichroic mirror 30 and is used for combining the light generated by all the light sources; and a relay lens 40 disposed between any two adjacent dichroic mirrors 30 and is used for constraining the light to improve its output efficiency.

[0025] Specifically, at least two light sources are arranged in a straight line and can generate light of different colors. The light source can be a device such as a light emitting diode (LED) or a laser diode (LD). Each light source structurally includes a light emitting area and an electronic device, and generates light of a specific color when activated by current or voltage.

[0026] The collimating lens 20 is arranged at the light output end of each light source, and is used to collimate the light generated by the light source to make it a parallel light beam. The collimating lens 20 is usually made of a transparent optical material (such as glass or plastic), has a lens shape, and can correct the scattering and refraction of the light to make it a collimated beam. The collimating lens 20 in the present application adopts a TIR lens. The number of collimating lenses 20 is equal to the number of light sources, and they correspond one to one.

[0027] The dichroic mirror 30 is arranged at the light output end of each collimating lens 20. The number of the dichroic mirrors 30 is equal to the number of the collimating lenses 20 and corresponds to each other. The dichroic mirror 30 is used to filter and separate the colors of the light passing through the collimating lenses 20. The dichroic mirror 30 is composed of two parallel glass sheets with a special film sandwiched between them. The material of the film is usually metal or dichroic material, which can selectively reflect or transmit light of a specific color according to the wavelength of the incident light.

[0028] The beam combiner 50 is perpendicular to the transmission light emitting optical axes of all dichroic mirrors 30, that is, the light emitting ends of all dichroic mirrors 30 are facing the working surface of the beam combiner 50. Therefore, it can be concluded that all dichroic mirrors 30 are located on the same straight line and have the same deflection angle. The function of the beam combiner 50 is to gather the light generated by all light sources together to form a combined light beam.

[0029] The relay lens 40 is located between any adjacent dichroic mirrors 30 to help transmit light between different components and reduce light loss. It can adjust the transmission angle of light and focus light.

[0030] The light sources are installed in a straight line and distributed in a straight line. A collimating lens 20 is connected to the light output end of each light source to collimate the light.

[0031] The light output end of the collimating lens 20 is connected to a dichroic mirror 30 for color filtering and separation of the collimated light.

[0032] The light-emitting ends of the dichroic mirrors 30 are kept in direct correspondence with each other and are opposite to the beam combiner 50 so as to combine the light generated by all the light sources together.

[0033] Between any two adjacent dichroic mirrors 30, a relay lens 40 is installed to constrain the light and improve the output efficiency.

[0034] By adopting the above technical solution, the multiple light sources in the light source generating assembly can generate light of different colors, so that the system has a variety of light source options to meet the needs of different applications. The collimating lens 20 can collimate the light generated by the light source to make it a parallel light beam; the dichroic mirror 30 achieves selective reflection and transmission of light of different wavelengths through color filtering and separation. The beam combiner 50 brings together the light generated by all light sources to form a combined beam of light. This helps to concentrate the energy and directionality of the light and improve the light output efficiency of the system. The relay lens 40 plays a role in constraining the light and optimizing the light transmission between adjacent dichroic mirrors 30. It can adjust the transmission angle of the light and focus the light, thereby improving the light output quality and efficiency of the system.

[0035] In one embodiment of the present application, the light source includes a mounting circuit board, on which a lamp bead capable of generating light is disposed, and the circuit board is connected to a heat conducting member capable of conducting heat away from the lamp bead when the lamp bead is working.

[0036] Specifically, the mounting circuit board is a printed circuit board, which is used to support and connect various components of the light source. The lamp bead is electrically connected to the mounting circuit board and can generate light. It can be a device such as a light emitting diode (LED) or a laser diode (LD). The lamp bead is usually made of semiconductor materials, such as gallium nitride (GaN) or gallium arsenide (GaAs), and has light-emitting properties.

[0037] The thermal conductor is a component installed on the circuit board to effectively conduct the heat generated by the lamp beads. It is usually made of high thermal conductivity materials such as copper or aluminum. The thermal conductor can be in the form of a heat sink, thermal pad or thermal adhesive to ensure that the temperature of the lamp beads is controlled within a safe range.

[0038] The lamp beads are mounted on the mounting circuit board and connected to the circuit on the circuit board through welding or sockets on the circuit board. The thermal conductive parts are connected to the mounting circuit board and are located under or around the lamp beads. Thermal conductive contact materials (such as thermal grease or thermal pads) are usually used between the thermal conductive parts and the lamp beads for thermal contact to promote heat transfer and heat conduction.

[0039] By adopting the above technical solution, the heat generated by the lamp beads can be effectively conducted out through the design and installation of the heat conducting member, thus preventing the lamp beads from being damaged due to overheating, which helps to improve the stability, life and reliability of the light source.

[0040] In an embodiment of the present application, the number of the lamp beads is three, namely a first lamp bead 11, a second lamp bead 12, and a third lamp bead 13; the first lamp bead 11 is used to generate white light.

[0041] Specifically, the first lamp bead 11, the second lamp bead 12 and the third lamp bead 13 are all mounted on a mounting circuit board and connected to the circuit on the circuit board through welding or a socket.

[0042] By adopting the above technical solution, the first lamp bead 11 is used to generate white light, thereby providing a brighter lighting effect, with a simple structure and easy implementation.

[0043] In one embodiment of the present application, the color spectrum range of the light generated by the second lamp bead 12 is A, 430nm≤A≤480nm.

[0044] Specifically, it is used to generate blue light, which has higher energy and shorter wavelength, and can facilitate the observation of the inner wall blood vessels.

[0045] In one embodiment of the present application, the color spectrum range of the light generated by the third lamp bead 13 is B, 390nm≤B≤430nm.

[0046] Specifically, it is used to generate purple light, which can achieve disinfection and ultraviolet detection, and further facilitate the observation of specific parts.

[0047] In one embodiment of the present application, the outermost dichroic mirror 30 away from the light combiner can be replaced by a right-angle prism 60 that reflects the light corresponding to it so that the light enters the light combiner.

[0048] Specifically, after the outermost dichroic mirror 30 away from the light combiner is replaced with a right-angle prism 60, it can directly reflect the corresponding light to the light combiner, which can reduce energy loss. Compared with the transmission loss through the dichroic mirror 30, directly reflecting the light can provide higher optical efficiency, allowing more light to enter the light combiner for processing.

[0049] In one embodiment of the present application, the working surface of the relay lens 40 and the light emitted by the dichroic mirror 30 are perpendicular to each other.

[0050] Specifically, the working surface of the relay lens 40 and the light emitted by the dichroic mirror 30 are perpendicular to each other, which can greatly reduce the loss of light caused by the relay lens 40 , has a simple structure, and is easy to implement.

[0051] In one embodiment of the present application, the light source generating components are two groups arranged in parallel.

[0052] Specifically, the light source generating components are arranged in two groups in parallel, which can realize mutual backup, and avoid the situation that the device cannot be used due to abnormal light source generating components. At the same time, the two groups of light source generating components can work alternately, and the excessive use of one group of light source generating components can be avoided. The structure is simple and easy to implement.

[0053] In one embodiment of the present application, a shading plate is disposed between two groups of light source generating components.

[0054] Specifically, a shading plate is provided between the two groups of light source generating components, and light interference between the two groups of light source generating components can be avoided by shielding the shading plate.

[0055] The present application discloses an endoscope, comprising a light source device as described in any one of the above.

[0056] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A light source device, characterized in that: include: At least one group of light source generating components, wherein the light source generating components include at least two light sources distributed in a straight line and capable of generating light of different colors; A collimating lens disposed at the light output end of each light source for collimating the light generated by the light source; a dichroic mirror disposed at the light output end of each collimating lens for filtering the light passing through the collimating lens; a beam combiner that is perpendicular to the light output axis of the transmitted light of each dichroic mirror and is used to combine the light generated by all light sources; and a relay lens disposed between any two adjacent dichroic mirrors and is used to constrain the light to improve its output efficiency.

2. The light source device according to claim 1, wherein: The light source comprises a mounting circuit board, on which a lamp bead capable of generating light is arranged, and the circuit board is connected with a heat conducting member capable of conducting heat away from the lamp bead when the lamp bead is working.

3. The light source device according to claim 2, characterized in that: The number of the lamp beads is three, namely a first lamp bead, a second lamp bead, and a third lamp bead; the first lamp bead is used to generate white light.

4. The light source device according to claim 3, characterized in that: The color spectrum range of the light generated by the second lamp bead is A, 430nm≤A≤480nm.

5. The light source device according to claim 3, characterized in that: The color spectrum range of the light generated by the third lamp bead is B, 390nm≤B≤430nm.

6. The light source device according to claim 1, wherein: The outermost dichroic mirror farthest from the light combiner can be replaced by a right-angle prism that reflects the light corresponding to it so that the light enters the light combiner.

7. The light source device according to claim 1, wherein: The working surface of the relay lens and the light emitted by the dichroic mirror are perpendicular to each other.

8. The light source device according to claim 1, wherein: The light source generating components are two groups arranged in parallel.

9. The light source device according to claim 8, characterized in that: A shading plate is arranged between the two groups of light source generating components.

10. An endoscope, characterized in that: The method comprises the light source device as claimed in any one of claims 1 to 9.

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